A grower joined a leafy shoot to a rooted stem. The leaves were above the join and the roots were below it. The phloem cells did not connect across the join.
The concentration of dissolved sugars was measured in the stem tissue.
| Time after joining in days | Sugar concentration 5 cm above the join in mg per g | Sugar concentration 5 cm below the join in mg per g |
|---|---|---|
| 0 | 14 | 14 |
| 3 | 20 | 10 |
| 6 | 27 | 6 |
Use the data to explain the changes in sugar concentration and the likely effect on the growth of the roots.
74 exam-style questions on AQA GCSE Biology 2.3 Plant tissues, organs and systems, covering 2.3.1 Plant tissues and 2.3.2 Plant organ system. Each one has a worked solution and a mark scheme showing where the marks go.